1. Dogs can infer implicit information from human emotional expressions

   • Natalia Albuquerque
   • Daniel S. Mills
   • Briseida Resende

   Original Paper Open access 14 August 2021 Pages: 231 - 240

   

2. Odor-based mate choice copying in deer mice is not affected by familiarity or kinship

   • Martin Kavaliers
   • Indra R. Bishnoi
   • Elena Choleris

   Original Paper 16 August 2021 Pages: 241 - 248

   

3. Adding colour-realistic video images to audio playbacks increases stimulus engagement but does not enhance vocal learning in zebra finches

   • Judith M. Varkevisser
   • Ralph Simon
   • Katharina Riebel

   Original Paper Open access 17 August 2021 Pages: 249 - 274

   

4. Decision-making at the time of parasitism: cowbirds prefer to peck eggs with weaker shells

   • Natalia A. Cossa
   • Juan C. Reboreda
   • Vanina D. Fiorini

   Original Paper 17 August 2021 Pages: 275 - 285

   

5. Friend or foe: Risso’s dolphins eavesdrop on conspecific sounds to induce or avoid intra-specific interaction

   • Lucie Barluet de Beauchesne
   • Mathilde Massenet
   • Charlotte Curé

   Original Paper 18 August 2021 Pages: 287 - 296

   

6. Preference and discrimination of facial expressions of humans, rats, and mice by C57 mice

   • Shigeru Watanabe
   • Sayako Masuda
   • Cesario Borlongan

   Original Paper 21 August 2021 Pages: 297 - 306

   

7. Cowards or clever guys: an alternative nest defence strategy employed by shrikes against magpies

   • Petr Veselý
   • Michaela Syrová
   • Roman Fuchs

   Original Paper 24 August 2021 Pages: 307 - 317

   

8. Changes in the anxiety-like and fearful behavior of shrimp following daily threatening experiences

   • Kohji Takahashi

   Original Paper 28 August 2021 Pages: 319 - 327

   

9. Planning actions with a magnetic tool: how initial tool orientation and number of functional ends influence motor planning abilities in capuchin monkeys (Sapajus spp.)

   • Gloria Sabbatini
   • Sara Pallotti
   • Valentina Truppa

   Original Paper 28 August 2021 Pages: 329 - 345

   

10. Memory enhances problem solving in the fawn-footed mosaic-tailed rat Melomys cervinipes

    • Misha K. Rowell
    • Tasmin L. Rymer

    Original Paper 28 August 2021 Pages: 347 - 358

    

11. Recovery-from-extinction effects in an anuran amphibian: renewal effect, but no reinstatement

    • James Mesich
    • Amanda Reynolds
    • Frédéric Laberge

    Original Paper 01 September 2021 Pages: 359 - 368

    

12. Cognition and the human–animal relationship: a review of the sociocognitive skills of domestic mammals toward humans

    • Plotine Jardat
    • Léa Lansade

    Review 02 September 2021 Pages: 369 - 384

    

13. Comparing utility functions between risky and riskless choice in rhesus monkeys

    • Philipe M. Bujold
    • Leo Chi U. Seak
    • Simone Ferrari-Toniolo

    Original Paper Open access 27 September 2021 Pages: 385 - 399

    

14. Seasonal changes in problem-solving in wild African striped mice

    • Celine Rochais
    • Carsten Schradin
    • Neville Pillay

    Original Article 30 September 2021 Pages: 401 - 413

    

15. No evidence of spatial representation of age, but “own-age bias” like face processing found in chimpanzees

    • Yuri Kawaguchi
    • Masaki Tomonaga
    • Ikuma Adachi

    Original Paper Open access 02 October 2021 Pages: 415 - 424

    

16. Developing a feasible and sensitive judgement bias task in dairy cows

    • Louise Kremer
    • Cornelis G. van Reenen
    • Laura E. Webb

    Original Paper Open access 11 October 2021 Pages: 425 - 445

    

17. Fish self-awareness: limits of current knowledge and theoretical expectations

    • Pavla Hubená
    • Pavel Horký
    • Ondřej Slavík

    Review 15 October 2021 Pages: 447 - 461

18. No coordination required for resources allocation during colony fission in a social insect? An individual-based model reproduces empirical patterns

    • François Lavallée
    • Guillaume Chérel
    • Thibaud Monnin

    Original Paper 19 October 2021 Pages: 463 - 472

    

19. Intra- and interspecific variation in self-control capacities of parrots in a delay of gratification task

    • Désirée Brucks
    • Matthew Petelle
    • Auguste M. P. von Bayern

    Original Paper Open access 21 October 2021 Pages: 473 - 491

    

20. Correction to: Domestic cats (Felis catus) prefer freely available food over food that requires effort

    • Mikel M. Delgado
    • Brandon Sang Gyu Han
    • Melissa J. Bain

    Correction 18 August 2021 Pages: 493 - 493